KGMK 4.1

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4.1 properties of minerals

vocabulary

inorganic:a mineral that is made of non live materials
crystal:the same particles which form a crystal
element:has only one atom
compound:has two or more element in it
mohs hardness scale:scores ten minerals by softest to hardest
streak:the color of the power it leaves behind
luster:what color the minerals tun when the suns light hits it
cleavage:if it can break apart easily
fracture:what the crack looks like
fluorescence:what happens to the mineral when they put it under fluorescence lights.

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outline

What Is a Mineral?

  • There are over 3000 minerals that scientists have discovered.
    • About 20 minerals make most of the Earths Crust.
  • These types of minerals are known as rock-forming minerals.

Naturally Occurring

  • Minerals have to be inorganic.
    • this means that minerals can't come back from materials that were once alive.
  • Geologists do not classify coal as a mineral for it comes from living material that had lived millions of years ago.

Inorganic

  • minerals can't come back from materials that were once alive.
    • coal may form naturally, but Geologists doesn't classify coal as a mineral for it comes from remains of living material that lived millions of years ago.

Solid

  • minerals are always a solid, with a type of shape and a definite volume.
  • particles that make a sold, a solid are packed together very tightly.
    • so they aren't aloud to move freely like the particles that make up a liquid.
  • solids keep their shape instead of changing its all because the particles can't flow freely.